Commutator



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Nov. 3, 1953 "h m y 2 %/A.MOWQ

Patented Nov. 3, 1953 OFFICE 2,658,158 7 COMMUTATOR Joseph Bender, Jr.,James Tipple, Elyria,

Eberly, and Richard Ohio, assignors to The General Industries Company,Elyria, Ohio, a corporation of Ohio Application August 3, 1950, SerialNo. 177,422

3 Claims.

. Our invention relates to commutators and relates more particularly tocommutators which are adapted for use on frictional horsepower motors,although not necessarily limited thereto.

It is an object'of our invention to provide an improved commutator whichwill .be simple to manufacture and to assemble with the armature coil. 1

1 Another objectof our invention is to provide an improved commutatorwhich will efiiciently lock the. armature wire or wires in place.

A further object of my invention is to provide a commutator of the typedescribed which may be assembled with a minimum of effort.

Other objects of my invention and the invention itself will becomereadily apparent by reference to the description of the invention whichfollows, in which description reference will be had to the accompanyingdrawings, wherein:

Fig. 1 is a top plan view of the commutator shell of our invention;

Fig. 2 is a side View of the Fig. 1;

Fig. 3 is an enlarged top view of a segment of the shell of Fig. 1;

Fig. 4 is an enlarged side view of the segment of Fig. 3;

Fig. 5 is an end view of the segment of Fig. 4;

Fig. 6 is a fragmentary perspective view of one of the segments in openposition showing leads of the armature passing therethrough;

Fig. '7 is a side view of the assembled commutator of our inventionimmediately prior to the locking of the leads shown in Fig. 6 andshowing a tool for locking the same in adjacent relation to saidcommutator;

Fig. 8 is an enlarged fragmentary view of the tool of Fig. 7 in section,showing the tool in its final forming position and the segment in lockedrelation to certain of said leads;

Fig. 9 is a view similar to that of Fig. 6 but showing a segment in aclosed position, the leads being locked therewith.

Referring now to the drawings in all of which like parts are designatedby like reference characters, the commutator shell of my invention isformed either in segments or in a blank split into segments and thesegments, designated at l0, are formed of a suitable conductingmaterial, as for example copper. Each segment, as best shown in Figs. 3,4 and 5, is provided with an arcuate body portion I I, an integrallyformed substantially fiat J-shaped radially outwardly extending legportion I2, and a pair of lugs or tangs l3 and [4 extending radiallyinwardly of the body portion commutator shell of II. The lug [3 providedon the lower edge l3 of each of said segments initiates adjacent saidleg portion 12 and is disposed inwardly angularly and upwardly of saidedge and the leg 14 is aligned in spaced relation therewith, initiatingon the upper edge 54 of the body portion II, and disposed angularlyinwardly and downwardly of said edge.

The lugs l3 and I4 serve as anchors about which a cylindrical core ofinsulation I5 is molde in a manner well known to the art.

The leg portions 2.01? our invention are each provided with a radiallyoutwardly extending fiat leg portion i5 and a notched foot I1 having anupwardly projecting nib l8 bent at an angle to the remainder of the footand to the leg, as best shown in Figs. 4 and 6.

When all of the body portions of the segments, which are shown as elevenin number, are secured to the core [5, forming a cylindrical shelltherefor, as shown in Figs. 1, 2 and 7, the legs l2 extend downwardlyand radially outwardly thereof, their ends generally describing an outercircle as shown in Fig. 1. They are disposed upon the upper coil end ofthe armature 20 and a pair of lead wires 2| therefrom are then projectedthrough the opening [9 in each foot, entering said opening from theunderside of the said foot. The leads are locked within the nib end ofthe foot, either by pressing the tail of the nib down with a hand tool,such as pliers, or by means of a round hollow cup, as shown in Figs. 7and 8, whereby all of the nibs of the several segments aresimultaneously pressed down, forming a good mechanical bond.

After the wires are thus locked in place, the excessive wire can be out01f either individually or collectively.

Although we have illustrated and described our invention in connectionwith a preferred embodiment thereof. we are, however, aware thatnumerous and extensive departures may be made however,

pended claims.

What we claim is:

1. A commutator segment comprising a commutator segment bar having atransversely arcuate outer surface and a lug integrally formed therewithextending from an end thereof, said lug being substantially entirely offlattened, and of J-shaped form, said lug comprising a long supportingarm, a relatively shorter supported arm, and a web integrally joiningthe outermost ends of the arms, the shorter arm initially extending fromsaid web in a direction which is divergent from the plane of the longerarm, said arms having substantially opposing side edges defining apassage disposed between the arms which is initially of substantiallygreater width than the thickness of terminal wires to be secured theretoand adapted to loosely receive said terminals and said shorter armadapted to be subsequently bent into the plane of said longer arm towedgingly compress any said terminal wires between the said side edgesof said arms.

2. A commutator segment comprising a commutator bar portion and aflattened, substantially J-shaped lug extending integrally outward froman end of said bar portion, the shorter arm of said lug beingre-entrantly extending towards said bar portion from a web portion atthe end of the longer arm, the laterally opposing edges of said armsbeing initially in different planes which extend divergently from saidweb portion, and said shorter arm adapted to be bent to cause it to bedisposed progressively closer to the plane of the longer arm to lessenthe distance between opposing side edges of the two arms, to wedginglyclamp a wire terminal between the arms.

3. A commutator segment comprising a commutator bar having a rearwardlyextending terminal connector lug formed integrally therewith, said lugcomprising two integrally joined fiattened metal arms disposed inlaterally interspaced relation and being normally extended inintersecting planes, and adapted responsive to bending of at least oneof said arms to be disposed approximately in a common plane, said armshaving opposing side edges between which a wire terminal may be looselydisposed before bending of any of said arms, one of said arms being bentwhereby said side edges are brought substantially closer together duringsuch bending to compressively wedgingly clamp such wire terminal betweenthe arms.

JOSEPH BENDER, JR. JAMES EBERLY.

RICHARD TIPPLE.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,214,470 Jeffery Jan. 30, 1917 1,631,461 Bonsieur M June 7,1927 2,400,590 Meyerhoefer May 21, 1946 2,451,500 Le Greid Oct. 19, 1948FOREIGN PATENTS Number Country Date 7,772 France Aug. 12, 1907 361,467Great Britain Nov. 26, 1931 391,888 Great Britain May 11, 1933

